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    SubjectRe: 2.1.111: IDE DMA disabled...BLAH...BLAH...
    > adequately explained by something being out-of-spec, whether it's the
    > cable or the chipset being bad.
    > But that doesn't change the fact that people see corruption that goes away
    > when they disable DMA.

    Linus - Yes there is something wrong
    No it cannot be DMA if DMA goes back to 1.3.20, almost every report
    says it started in 2.1.x, most are not UDMA but older DMA

    The only common theme right now seems to be SMP and SCSI, and thats SMP
    machines in the SCSI case (not option), unknown in the IDE case.

    The only known actual problem is BX chipsets and older versions of the Cyrix
    detect where DMA corruption is one possible result but plain not working
    is the normal case.

    > The _only_ thing I ask for is that DMA be disabled by default, or at least
    > disabled when there is any reasonable cause fr doubting the hardware.
    > David Miller reports that certain windows drivers have a black-list, and
    > that may be what we need to have. It certainly indicates that somebody
    > else is aware of problems.

    Dave then discovered he was wrong. Please read all DaveM's mail on the
    subject. That was a PIO3/4 blacklist - which isnt DMA related.


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